For the last couple of days, I've missed my 10,000-step goal by 100 to 500 steps. This is why:

Yesterday Chicago got its biggest November snowfall in 120 years; today it's well below freezing. Walking is treacherous at best for bipeds and uncomfortable for quadrupeds. So today might also be a miss.

I haven't missed three days in a row since March 5th-7th—when, not coincidentally, we had a miserable, snowy week. Winter is hard on fitness.